2024-06-28
数学解方程
x1-2x2 3x3-4x4=4,0 x2-x3 x4=-3,x1 3x3 0 x4=1,0-7x2 3x3 x4=-3
1 分钟前 |般务助理最快回答 (2x-1)/3-(x 2)/6=20 2(2x-1)-(x 2)=
cos2xdx = 1/2 ∫cos2xd(2x) = 1/2 sin2x c,∫cos05xdx = ∫(1
因式分解xy 6-2x-3y=(x-3)(y-2) 4.
2014-12-15 20:08 提问者采纳 1,12-3x 5=7-5x 5x-3x=7-17 2x=